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Zithromax Dosage

Generic name: azithromycin dihydrate
Dosage form: tablets and oral suspension

This dosage information does not include all the information needed to use Zithromax safely and effectively. See full prescribing information for Zithromax.

The information at Drugs.com is not a substitute for medical advice. ALWAYS consult your doctor or pharmacist.


ZITHROMAX for oral suspension (single dose 1 g packet) can be taken with or without food after constitution. Not for pediatric use. For pediatric suspension, please refer to the INDICATIONS AND USAGE and DOSAGE AND ADMINISTRATION sections of the prescribing information for ZITHROMAX (azithromycin for oral suspension) 100 mg/5 mL and 200 mg/5 mL bottles.

ZITHROMAX tablets may be taken without regard to food. However, increased tolerability has been observed when tablets are taken with food.

The recommended dose of ZITHROMAX for the treatment of non-gonococcal urethritis and cervicitis due to C. trachomatis is: a single 1 gram (1000 mg) dose of ZITHROMAX. This dose can be administered as as one single dose packet (1 g).

Prevention of Disseminated MAC Infections

The recommended dose of ZITHROMAX for the prevention of disseminated Mycobacterium avium complex (MAC) disease is: 1200 mg taken once weekly. This dose of ZITHROMAX may be combined with the approved dosage regimen of rifabutin.

Treatment of Disseminated MAC Infections

ZITHROMAX should be taken at a daily dose of 600 mg, in combination with ethambutol at the recommended daily dose of 15 mg/kg. Other antimycobacterial drugs that have shown in vitro activity against MAC may be added to the regimen of azithromycin plus ethambutol at the discretion of the physician or health care provider.

DIRECTIONS FOR ADMINISTRATION OF ZITHROMAX for oral suspension in the single dose packet (1 g)

The entire contents of the packet should be mixed thoroughly with two ounces (approximately 60 mL) of water. Drink the entire contents immediately; add an additional two ounces of water, mix, and drink to assure complete consumption of dosage. The single dose packet should not be used to administer doses other than 1000 mg of azithromycin. This packet not for pediatric use.

Renal Insufficiency

No dosage adjustment is recommended for subjects with renal impairment (GFR≤80mL/min). The mean AUC 0–120 was similar in subjects with GFR 10–80 mL/min compared to subjects with normal renal function, whereas it increased 35% in subjects with GFR<10mL/min compared to subjects with normal renal function. Caution should be exercised when azithromycin is administered to subjects with severe renal impairment. (See CLINICAL PHARMACOLOGY-Renal Insufficiency.)

Hepatic Insufficiency

The pharmacokinetics of azithromycin in subjects with hepatic impairment have not been established. No dosage adjustment recommendations can be made in patients with impaired hepatic function. (See CLINICAL PHARMACOLOGY-Hepatic Impairment.)

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